Grate.



R. G. LATTING.

GRATE.

APPLICATION FILED JUNE 20, m4.

1 1 86,805. Patented June 13, 1916.

2 SHEETS-SHEET I.

THE COLUMBIA PLANOORAPH c0., WASHINGTON, D. c.

R. G. LATTING.

GRATE.

APPLICATION FILED JUNE 20. 1914.-

1 1 86,805 Patented June 13 1916.

2 SHEETS-SHEET 2.

a tinirnn s r T 0 all whom it may concern 1 RICHARD e. famine, or ATLANTA, GEORGIA.

Cal-RATE.

Be itknown that I, RICHARD G. LATTING, a citizen of the United States, residing at Atlanta, in the county of Fultonand State of Georgia, have invented certain new and useful Improvements in Grates, of which the following is a specification.

This invention relates to grates, and more particularly thoseintended for burning fine fuel by forced draft though certain features of the inventionare applicable to gratesfor burning other classes of fuel.

Characteristic features of the invention are the use of bearer bars beneath the grate bars extending in the same general direction therewith, and the use of a grate bar made up of a substantially rectangular yoke or frame and one or more bars nested within said yoke or frame. By this construction the yoke and the nested barssupport each other and tend to preserve thenarrow slots or openings adapted to the most successful burning of fine fuel.

Another advantage is the ready replacement of either the yoke or the nested bars or both without dismantling the entire grate.

The preferred construction is shown in the accompanying drawings, in which Figure 1 is a plan view showing the bearer bars and a grate bar unit assembled therewith; Fig. 2 is a transverse section through a portion of the grate structure; Fig. 3 is a front end elevation of the same; Fig. 4 is a section on the line H of Fig. 1; Fig. 5 is a perspective view of the regular bearer bars; Fig. 6 is a perspective view of a special form of bearer bar used at the sides of the grate; Fig. 7 is a perspective view of the grate bar yoke; and Fig. 8 is a perspective view of one of the nested grate bars, removed from the yoke.

Referring now particularly to Fig. 1, a bearer bar 9 is mounted on the Walls 10 of the furnace at each side of the grate, and is provided with an upwardly extending strengthening rib 11. Also mounted on the Walls 10 of the furnace are additional bearer bars 12 extending substantially parallel with the bars 9. The bars 9 and 12 are plate-like in their general formation and are so formed that when assembled they produce a series of large intervening rectangular apertures 13. In Fig. 1 only one of the regular bearer bars 12 is illustrated, but ordinarily more would be used in the construction of a grate, as indicated in Figs. 2 and 3.

Specification of Letters Patent.

7 Application filed June 20, 1914. Serial No. 846,238.

The bars 12 are strengthened on their lower sides by flanges or ribs 1 1 and are provided on their upper faces with two spaced ribs 15 designed to position the grate bar yokes 16 which rest between the ribs 15 on ad acent bars. As clearly shown in Fig. 7

the yokes '16 are substantially rectangular in plan and as best shown in Fig. 2 rest throughout their entire length on the bearer bars 9 and 12, and surround the apertures 13 formed by these bars when assembled.

.Mounted within the yoke 16 and supported by their ends on the adjacent end portions of the bearer bars 9 or 12 are a series of bars 17 of the form clearly shown in Fig. 8. These bars are held in spaced relation by the lugs 18 formed on them, and on one side member of the yoke 16. In the drawings, two of the bars 17 are shown but it is to be understood that their number is dependent on the individual case and I contemplate using more or fewer as the occasion may require. Also the bars 17 might be cast in pairs or multiples, in which case the lugs 18 would serve as connecting webs between them. I prefer however to cast the bars individually to permit individual assembly.

The upper face of the yokes 16 and bars 17 slopes upward rather sharply at one end, as indicated at 19 and 20. This permits the placing of the tops of the grate bars slightly below the level of the fire door and yet provides for easy cleaning of the grate through the fire door and prevents the accumulation of ashes at the forward end of the grate which accumulation, if permitted, would produce holes in the fire and uneven draft. Earth or clay is packed in between the yokes 16' at 21 to seal the bars against the passage of air around their sides or if this be omitted the accumulation of ashes will efiect a similar result.

The. advantages of the above construction are many. The grate bar yokes are sustained throughout their length while the bearer bars are protected from all undue heat. Individual yoke bars may be removed without dismantling the rest of the grate or the bars 17 may be similarly removed so that repair or replacement is easy. The most important feature, however, is the fact that the yokes 16 and the bars 17 sustain each other and prevent warping or distortion, a feature of the utmost importance in grates for burning fine fuel. For example I contemplate making use of grates of this class in furnaces in which the'air openings replacement.

through the grate are only 6% of the grate area, and in which it is necessary to have a large number of very narrow and rather closely spaced slots. By thepartlcular construction adopted I am able to secure a grate structure which has all the advantages inherent in casting a plurality of bars in a single piece and yet secure a structure in which individual bars are removable for The castings are simple in form and may be readily'cast from very simple patterns, thus "producing a grate which is inexpensive tomanufacture.

In some cases the inclined*p0rtions l9 and 20 will not be desirable andinthat event the bars may be fiat on topin the usual manner V i Y I-Iaving thus described my nventlon, What -I claim 1s r i l. The combination of a plurality'ofsubstantially parallel bearer bars; aplurality t of substantially rectangular yoke like grate bars sustained throughout their length Copies of this patent may be obtained for 7 name to this specification in the thebearer barsand extending in the same general direction therewith, and grate bars mounted within each of said yoke-like bars and spaced therefrom to provide air slots.

- 2. The combination of aplurality of substantially parallel bearer bars wider at their ends than at their middle portions; a plugrate bars: sustained substantially throughout their'length by the bearer bars and extending in the same general directi on'there with; and a'plurality of grate bars' having projectin lugs mounted between thesides said lugs and supported at their ends by the end portions of the bearerbars. In testimony whereof I have signed my two-subscribing witnesses. p

RICHARDG. LATTING.

Witnesses:

iEULA'Mt'S PURLooK j EJL. Monenm five cents eaeh,fby addressing thPCommiuionei o! i Pnte n tl. Washington, D. G." V 3 m i so;

i rality of substantially rectangular yoke-like:

'of'said yoke-like bars, spaced therefrom by a i presence of 

